Filter.



H. A. FRASCH.

FILTER. APPLICATION FILED MAR.18, 1908.

Patented N0v.10, 1908.

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' FILTER.

APPLIOATION FILED MAR. 1a, 1908.

903,697. Patented Nov. 1o, 1908.

a SHEETS-SHEET 2.

H. A. PRASGH.

FILTER. APPLICATION FILED MAB. 1s, 190e.

903,697. Patentedwov. 1o, 190s.

3 SHEETS-SHEET 3.

55 u I attenua? wwf FANS A. FRASCE, OF NEW Yltli, N. Y.

FILTER.

i Application filed March 18, 1965. Serial le.

To all whom it may concern:

Be it knovvn that l, HANS A. Frisson, a

citizen of the United States, residing at' Newv York, in the county ofNew York and State Lof New York, haveinventeda certain new and usefulImprovement in Filters, of which the following is a full, clear, andexact description.

The object of the invention is to provide a filtering apparatus for usein manufacturing chemicals and other substances with' means whereby thefiltered substances may be re-k moved quickly andv economically. y

The invention has reference particularly to the recovery of solidsubstances from "fluids, and more especially to the economical handlingof nickel ammonium chlorid separated from caustic liquor..

In the manufactureof. nickelsalts by the reaction of nickel hydrate uponanimoniated salt brine, and the subsequent mixing oit 'the nickel saltwith ammonium chlorid and cal.- cium chlorid solution prior tosubjecting it to distillation for the recovery of the ammonia and nickelhydrate, and the separation and removal of the nickel hydrate from thestill liquor in which it is suspended, and the subsequent mixing of `thenickel hydrate with fresh annnoniated salt brine, `the presence ofammonia renders the handling and mixing of the nickel salt and nickelhydrate noxious and involvesl a possibility or' loss of ammonia.

The present invention is designed to render this process innox'ious andreef'rom loss of ammonia.

The application of the inventionv to lilter ing apparatus generally,besides for the spo cilic purpose-stated, Oilers the advantage ofemploying ilters ofmuch larger size than otherwise would be practicable,and in addition it admits of the quick emptying' ci the filter in muchless time, and, hence, renders thefilter more quickly available forservice again than heretofore.

In the accompanying d1 "'avvings,r illustrati-- ing theinvention,'inlthe several figures of which like parts are similarlydesignated, Figure 1 is a vertical section, illustratinu` one form ofthe invention. Fig-.2 is a plan view. Fig. 3 is a vertical section andpan tial elevation of a modiiication. Fig. e Ais a. vertical section-cfaportion of anothermodification.

The filter body is composed of a cylinder Specification ofetters Patent.

1, made up of one or inercrin Patented Nov. i fs. 1 Qr.

,ser

s, having L k1 ledge flanges to Winch are respectively secured theconcave bot-toni. 2- and the comple-r mental top 3. in 'this concavebottoni is mounted a disch pipe preferably ceutrally thereof, and thispipe may be ci' any desired cross-sectional shape, and because oll itspurpose and function it herein referred to as a conduit or dischargeconduit This cou-fluit projects outside oit the bottoni and extends upinto the cylindrical portion of the iilter and is provided with a valveseat 5 at its top.

6 is e screen of any suite-.ble sort, suitably supported Within thecylindrical portion of the filter and surrounding the discharge couduitLi, and below 'this screen und in the con' cave bottoni is anotherscreen Y also suitably sin; ported and surrounding the conduit Ll, andbetween these tivo screens is arranged any suitable iltering medium.such sand or gravel, 'or a mixture-or' these, or any other ilteringmaterials suitable for the purpose in hand, the whole constituting auiten-bed. Thus, the conduit l extends through the iilter-bed andis'snrrounded by it.

S is a suction pipe secured in the bottoni and connected to a. receiverand vacuum pump or other suitable apparatus. Suitable Work openings 9are provided for access to the interior.

l0 is a ventilator connected with an es haust ran or other apparatus by'which the noxious fumes removed and the ammonia escapinfr from theliitering substance is collected and conveyed to a'scruliiber to bea`osorbed in sait brine or water. On the top 3 is a suitable casting ll,provided with a .threadless openingl lil and a yoke l?. having;

a guide il.

Wiveled to stein l5 and hat@ ble or packing to open This stein may.,y be'svornilgeiised purpose of sepan ting nickel chlorid from caustic soda.liquor, ano

ally mining? the fornaci' with celtcuuu solution the valve l@ is tti-neddowffi to close the conduit Ll, und then the mixture of caustic sodaliquor and nickel salt comingitrom a converter or other source, isdelivered -into the body of the filter 1, and the air in the filterbottom is exhausted through pipe 8. When all ofl the caustic soda liquorhas been drained from the nickel salt, thevalve is raised so as to openthe conduit 4, after which the nickel salt is removed from the body of'the filter by any suitable means, mechanical or manual.

In the modification shown in Fig. 3, pipe 8 is omitted, and the conduit4 is shown with a row of perforations l) at its base within the bottomof the filter, and the valve stem 15 is supplied with a hand wheel 20for op erating the valve, or said valve may be power operated as in thev'former instance. The conduit 4 opens into a receiving and suction tank2l which is supplied With a suction pipe 4L2 connected with anysuitablevacuum or other pump, and it is also supplied at its bottom with aliquid or filtrate outlet pipe 23, having an air-inlet 24 for agitatingpurposes, and a discharge pipe for the. filtered substance after it hasbeen mixed with the liquid vehicle. This suction tank also has at itstop a delivery pipe 26. v

for introducing the desired liquid to be mixed with the filtered solidsubstance. ln using this form of the apparatus, the valve is closed, asbefore, and the substance to be filtered is introduced and the air isexhausted through pipe 22. The caustic soda liquor passes through thefilter-bed and out through the holes 19 in the conduit4 to the tank 2l,the nickel salt collecting in the body of the filter on the upperscreenor top oif the filterbed, as before. When all of the caustic sodaliquor has been drained from the nickel salt, the filtrate having beenpreviously removed from the receiver 2i through pipe 23, the valve 1G isopened and the nickel salt is then removed from the body of the filterby any suitable means anddischarged through the conduit 4 into the tank2l, where it is mixed with a suitable vehicle for further treatment.When the material in the tank 2i is properly mixed, it is dischargedthrough pipe 25 to any desired station for any necessary furthertreatment. The filtered substance may be conveyed away from the filterthrough the conduit 4 to any suitable vessel, such as a tank, conveyer,furnace, or other receptacle and vthis vessel may be of' a characterappropriate to the substance to be treated. For example, if the' filteris employed for sodium bicarbonate, the yfiltered substance may bedeliveredthrough the conduit 4 directly to 'a drying or calciningdevice. In the case of nickel hydrateltcred from still liquor, thehydrate may be delivered directly to a converter to be mixed withammoniated salt brine, and the filter may be mounted upon the converterby means of the flanges at the outside end oi" the conduit 4.

Referring tothe modification shown .in

Fig. 4, the discharge c ond-uit'jis shown asfixed `to the ta1ik2'1., asv1n the modificatio'n` shown in Fig- 3 but instead of having theopenings` at 19 in Fig. 3, this conduit may be made solid asinl theconstruction shown.

in Fig. 1, and the necessary connection be,-

tween the bottom of the'filter cylinder and' the tank 21 may beeffectedl by a pipe 27 having a valve`28 as a .filtrate outlet and alsohaving a lbranch pipe 29 having a valve 30 which may also Abe used as' afiltrate outlet. l f 'l The filter may be emptied of its filteredsubstance through the discharge conduit by prefer to prov-ide mechanicalmeans for econonncally and vquickly emptying the'iilter. ln'eithercase',I whether hand tools. bensed- `8l? hand and with 'any usual'handltools operated by way of 'thev work openings Vin they side ortopbutfas 'shown' in Figs. 1`and`2, l y

or the mechanical means, the filter may be piickly emptied and, therebyvbe returned to service-in a very much-shorter time than by the oldmethods in which a relatively 'large discharge conduit is not'used. bymeans of Athe present invention, as ab ready stated, filters of' largerarea and con.

`filter, and this frame is adapted to. be ro-` tated upon this track, asby means of a pinion 39 meshing in a toothed rack 40 fixed to the rim.The pinion 39, as shown, mounted upon a vertical .shaft 41 whichissuppiied with a pulley 42 connected up to any suitable source` ofpower. Anysuitable number of scraper blades 43 may be mounted upon vthis-frame, and they are preferably mounted obliquely to the frame, or'tangenti-ally to the discharge conduit 4, and they are held and guidedin the frame by means of guich.

eefl l'loreovcr, i

ile

rods V44- mounted in suitable guide-sockets 45, and each of these bladeshas a screw-rod 4G passing 'through a guide-socket 47'on the frame, andeach screw-rod has a worm-wheel nut 48 in mesh with a Worm 49 ontheshatt 50. The worm-Wheel nut is placed between braces 36, 'and whilepermitted to rota t does not move lengthwise of the screw-rod',

but does move said screw-rod lengthwise.l

Each shaft- '50 has a clutch member 5i, and in connection with thisclutch vmember is a clutch lever 52 accessible through alwork opening 9in the side of the cylinder. Op-

posite each shaft 50 is one of the wheels 37,

charge conduit extending from the te soiree? and the shaft of this Wheelhas the other clutch member 53 to cooperate with the clutch member l,and, consequently', when the clutch members are in engagement the' shaftis turned and the worm-Wheel nut turned and acts upon the screwrod .4l-6to depress the scraper blade automatically and "proportionately to thedisplacement of the tank 21 capable of a variety of uses, both on thefiltered substance and in connection with theV filtrate. Further, 1t 1sto be noted that the valve stem in Fig. 3 is a rotary stem, its

scre'ivthread engaginga screwthread in the casting ll to effect itslongitudinal movement, While in Fig. l the valve stem doesl not rotate,but is held against rotation by some sort of angular engagement with theguide 14, and its longitudinal movement effected by the feed of the nut1S. These and other modiiications of the main construction, namely, afilter having a bottom outlet for the filtered substance', are Withinthe spirit and scope of the invention.

That I claim is l. filter, having aV filter bed, and a discharge conduitextending from the top of the filter bed entirely through said filterbed. terminating in a discharge opening at the bottom of the filter4 andforming a direct communication between the top of the filter bed and asuitable receptacle under the filter, through which the filteredsubstance may be discharged Vin compact forni.

2. A filter, having a lilter bed, and a discharge conduit extending fromthe top of the filter bed entirely through said filter bed, terminatingin a discharge' opening at the bottom of the filter, and forminor adirect communication between the top o? the filter bed and a suitablereceptacle under the filter, through which the filtered substance may bedischarged in compact form, and means fr discharging the filteredsubstance from 'the top of the filter bed through said dischargeconduit. 4

3. A filter, having a filter-bed, a ldischarge conduit extending fromthe top of' the filterv bed entirely through it, means'to openy andclose said discharge conduit, and a rotary scraper arranged above` thefilter-bed and serving todischarge the filtered substance through thedischarge conduit.

af. A filter, having a iilter bed,

filter. bed entirely through said fiiter bed, terminating in a dischargeloperinog at :the

i5 bottom of the filter, and forming a, direct communication between thetop of the filter bed anda. suitable receptacle under the filter,through which the filtered substance may 'be discharged in compact form,and means to dranVY ofi' the liquid from the solid substance and therebyleave the solid substance on the .filter bed to be discharged throughsaid conduit.

A filter, having a filter bed, a screen overlying the said filter bed, adischarge conduit connected with the surface of the screen and extendingthrough the body of the filter bed and terminating in ay dischargeopening at the bottom of' the filter. and forming `a directconnuunication between the surface ofthe screen and a suitablereceptacle under the filter, and through which the filtered substancemay be discharged in compactforni.

(i. filter, having in` its bottom a discharge conduit, a filter-bedsurrounding said conduit and through which said conduitprojects, a valvefitted over the conduit to open and close said conduit, means to drawofi the fluid from the solid and thereby leave the solid on thefilter-bed to be removed through the conduit, and means to discharge thefiltered substance through the said conduit.

7. A filter, having in its bottoni a discharge conduit, a filter-bedsurrounding said conduit andv through which said conduit projects, avalve fitted to open and close said conduit, and means to exhaust theair from belon7 the filter-bed and to remove the fiuid while retainingthe solid portion of the substance treated, such solid portion beingremovable from the filter through the conduitupon the opening of thevalve.

8. A filter, having a filter-bed, a receiving vessel upon which it ismounted, means for controlling communication between the filter and thereceiving vessel, including a. discharge conduit projecting up throughthe filter-bed into the filter, and a valve for controlling the openingand closing of said conduit.

9. A filter, having a filter-bed. a discharge conduit extendingthroughsaid filter-bed, a scraper arranged Withiiigvthe filter and abovethe lteubed, and means to rotate said scraper over the said bedandthereby detach the filtered substance and convey it to and discharge itthrough the conduit.

10. A filter,I having a filter-bed, a discharge conduit extendingthrough said bed, and means to dislodge the filtered substance from Ythe surface of the filter-bed and convey it to discharge bed, and

means to adjust said blades automatically to regulate the amount offiltered substance to be discharged.

l2. A filter7 having a filter-bed, a discharge `conduit extendingthrough said bed, andi comprising a rotaryl frame andv scraper bladesadjustably mounted thereon, said frame having wheels running upon atrack and connections between any of said Wheels and the scraper' bladesconstituting means to automatically adjust said blades.

13. A filter-having a filter-bed, a discharge conduit extending throughsaid bed, and means to dislodge the filtered substance from the surfaceof the filter-bed and convey it to and discharge it through saidconduit, and comprising a rotary frame and scraper blades adjustablymounted thereon, a track to support Athe frame, said frame having wheelsmounted upon the track, Worm-gearing applied to the adjusting mechanismof the scraper blades, and a driving connection applied between any ofsaid Wheels and the Worm-gearing.

ln testimony 'whereof I have hereunto set my hand -this 12th day ofMarch A. D.l 1908.

Witnesses 5 lVM. H. FINGKEL, Pmmr F. LARNER.

